docs: Update CONTRIBUTING.md to include PR label guidelines for auto

[vishal-bala]

Note

Low Risk
Low risk documentation-only update plus a lockfile metadata/version bump; no runtime code paths change, though the uv.lock update could cause minor churn if committed without corresponding dependency changes.

Overview
Updates CONTRIBUTING.md to document required auto:* PR labels (with a label/semver mapping) and adds the label requirement to the PR checklist.

Bumps uv.lock metadata (revision to 3) and updates the editable redisvl package entry from 0.14.0 to 0.14.1.

^{Written by Cursor Bugbot for commit 4e38cb9. This will update automatically on new commits. Configure here.}

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[chatgpt-codex-connector]

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